"agilos": a middleware control architecture for application-aware quality of service adaptations
"agilos": a middleware control architecture for application-aware quality of service adaptations
End-User Specification of Quality of Service Applying the Model-Driven Approach
ICAS-ICNS '05 Proceedings of the Joint International Conference on Autonomic and Autonomous Systems and International Conference on Networking and Services
The design of the TAO real-time object request broker
Computer Communications
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Nowadays, more and more applications are distributed and require runtime guarantees from their underlying environment. To reach theses guarantees, Quality of Service (QoS) information must be provided. The development of QoS-aware applications requires the control and management of low-level resources. It is a complex task to correlate high-level domain-specific QoS requirements with low-level system-dependent characteristics. Various middleware architectures have been proposed to provide a QoS support [1][2] and to free the designer from low-level resource concerns. Some architectures [3] use dynamic adaptation of applications or a component-based conception [4]. Our approach uses the Model Driven Architecture [5]: the mapping of QoS constraints with platform specific resource management can be automated during the transformation steps leading from the model to the software implementation. In this paper, we present a solution to model high-level user-oriented QoS constraints, and we demonstrate that the MDA, associated with Aspect-Oriented Software Development, can ease the conception of QoS aware application.